Investments (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 security	Mar. 31, 2013	Dec. 31, 2013 security
Investments [Abstract]
Gross gains on investments	$ 200,000	$ 1,200,000
Gross losses on investments	28,000	8,000
Proceeds from sale of investment securities	$ 11,300,000	$ 8,200,000
Number of debt security positions	61		84